meili-epfl/Meili

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- When selected, use grey -->
    <item android:drawable="@drawable/heart_on"
        android:state_checked="true" />
    <!-- When not selected, use white-->
    <item android:drawable="@drawable/heart_off"
        android:state_checked="false"/>

</selector>